Mine-car wheel.



J. T. PARKS &. M. T. DAVIS, JR.

mmn'cm WEEEL. APPLIOATIGN FILED SEPT. 11,.1908.

909, 112. I Patented Jan. 5, 1999..

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UNITED STATES PATENT oiuuon JOHN THQMASPARKS AND MADISON THENTON DAVIS,,JR OF CHARLESTON, WEST VIRGINIA.

MINE-CAB WHEEL.

Specification of Letters Patent.

Patented Jan. 5, 1909. I

Application filed September 11, 1908. Serial No. 452,647.

To all vhom it may concern:

Be it known that we, JOHN THOMAS PARKS and MADISON THENTON DAVIS, Jr,

citizens of the United States, and residents of Charleston, in thecounty of Kanawha and State of West Virginia, have invented certain newand useful Improvements in Mine-Car Wheels, of which the following is aspecification.

This invention is an improvement in wheels, and especially in car wheelsof the class illustrated by the patent to Bond, No. 7 86,405, datedApril 4, 1905; and the invention consists in certain novel constructionsand combinations of parts as will be hereinafter described and claimed.

In the drawings-Figure 1 is an end view. Fig. 2 is a vertical crosssection on about line 22 of Fig. 1, of a wheel embodying the invention,and Fig. 3 is a detail perspective view showing the grooved spindle, andthe hub securing pin, and the retaining screw.

As above suggested the invention is an improvement in the constructionshown in the Bond patent, the present wheel being in the nature of animproved Bond wheel, and in carryin out the invention we provide theaxle A with a spindle B, receiving the wheel C, the said spindle beingprovided near its outer end with an annular groove B. The wheel has itshub provided with a radial aperture D, which is threaded at D to receivethe retaining screw E. The aperture D communicates at its inner end withthe groove B in the spindle and extends outwardly on an axis at a rightangle to the axis of the spindle, and a pin F is fitted revolubly in theaperture D and extends at its inner end into the groove B in thespindle, so that when in said grooveit will operate to lock the wheel Con the spindle.

By preference the pin F is made of tool steel, is sawed off square atboth ends and smoothed at said ends by emery or any other suitable way,and this pin is made of a diameter slightly less than the width of thegroove B, said groove being usually made about one inch in width, andthe pin F about threeuarters of an inch. In operation the pin F isadapted to be revolved by its engagement with either wall B or B of thegroove B, and the pin is retained with its inner end in the groove B bymeans of the retaining screw E, which is threaded to engage at D withthe threads in the wheel hub, and has at its inner, end a point E, whichcenters against the outer end of the pin F, thus retaining the pin F,and as the latter turns freely on the oint E, the pin F will be free torotate an at the same time will not turn the retaining screw E todisplace the same as will be understood from Figs. 2 and 3 of thedrawings.

The screw E has a square or grooved head E to facilitate its turning,and is also provided with a shoulder E to abut the head. A leather orother suitable washer G is fitted beneath the shoulder E of theretaining screw, as will be understood from the drawings. The point E ofthe retaining screw is preferably case-hardened in practice.

By the described construction it will be noticed the pin F is securelyheld in place, is free to rotate, thus avoiding friction, and

such rotation of the pin is permitted without endangering anydisplacement of the retaining screw as more fu ly describedhereinbefore.

We claim 1. The improvement herein described comprising the spindlehaving an annular groove, a wheel having its hub on said spindle, andprovided with a radial aperture threaded at its outer end andcommunicating at its inner end with the spindle groove, and extending ina direction at a right angle to the axis of the spindle, a pin fittedrevolubly in said aperture and extending at its inner end into thegroove in the spindle and adapted to be revolved by its engagement witheither side wall of the spindle groove, and operating at its outer endwithin the radial aperture in the hub, and a retaining screw threaded inthe outer end of the aperture and having a shoulder to abut the hub, andprovided at its inner end with a point centering at the outer end of thepin whereby the said pin will be retained with its inner end in thegroove of the spindle, and will be free to rotate and will not operateto displace the retaining screw, all substantially as and for thepurposes set forth.

2. The combination of a spindle having an r into the groove in thespindle and free to reannular groove, a Wheel having its hub 0n theouter end of the pin, all substantially as said spindle and providedWith an aperture and for the purposes set forth. 7 w for the receptionof a securing pin, a pin in i v I JOHN THOMAS PARKS. said aperture andentendlng at its inner end I MADISON THENTON DAVIS, JR

tate Within the said aperture of the hub and Witnesses: a screw threadedin the said aperture and H. MOO. ANDERSON, having at its inner end apoint centering at KATE A. KAIN.

